Annual report pursuant to Section 13 and 15(d)

Fair Value Disclosures (Details Textual)

v2.4.1.9
Fair Value Disclosures (Details Textual)
Dec. 31, 2014
Dec. 31, 2013
6.25% senior notes due 2015 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 6.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandFifteenMember 		 
7.731% senior subordinated notes due 2017 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 7.731%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorSubordinatedNotesDueTwoThousandSeventeenMember 		7.731%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorSubordinatedNotesDueTwoThousandSeventeenMember
4.50% senior notes due 2018 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandEighteenMemberDomain 		4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandEighteenMemberDomain
7.15% senior notes due 2020 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 7.15%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandTwentyMember 		7.15%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandTwentyMember
7.00% senior notes due 2022 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandTwentyTwoMember 		7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_SeniorNotesDueTwoThousandTwentyTwoMember
1.875% convertible senior notes due 2032 [Member]    
Fair Value Disclosures (Textual) [Abstract]    
Debt instrument, stated rate 1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_ConvertibleSeniorNotesDueTwoThousandThirtyTwoMemberMember 		1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= mth_ConvertibleSeniorNotesDueTwoThousandThirtyTwoMemberMember